1200512500 has 72 divisors (see below), whose sum is σ = 2865004128. Its totient is φ = 436500000.

The previous prime is 1200512447. The next prime is 1200512543. The reversal of 1200512500 is 52150021.

1200512500 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×1200512500³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133135 + ... + 141865.

It is an arithmetic number, because the mean of its divisors is an integer number (39791724).

Almost surely, 2^1200512500 is an apocalyptic number.

1200512500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200512500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1432502064).

1200512500 is an abundant number, since it is smaller than the sum of its proper divisors (1664491628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1200512500 is an equidigital number, since it uses as much as digits as its factorization.

1200512500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8771 (or 8749 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1200512500 is about 34648.4126620542. The cubic root of 1200512500 is about 1062.8098289058.

Adding to 1200512500 its reverse (52150021), we get a palindrome (1252662521).

It can be divided in two parts, 12005 and 12500, that multiplied together give a square (150062500 = 12250²).

The spelling of 1200512500 in words is "one billion, two hundred million, five hundred twelve thousand, five hundred".